the only thing I would do is upgrade to 6 gigs of RAM unless you plan on running a 32-bit OS. Everything else looks good. Also, I would suggest an aftermarket cooler, even for light overclocking. Some suggestions:

Look at the CoolerMaster 690 case. Its just as wide as the 1200, so it will fit a good cooler, pretty good ventilation, and about $100 less. Its about the best value for a midtower out IMO. You should also get more ram.